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56
meel mere eller mindre tydelige violette Tværbaand.
Legemets Længde 21/."""; Spandvidde 15""".
Bemærkninger. Nærværende Art er egentlig først
kjendelig beskreven af Hoek. Hvorvidt den i Virkeligheden
er identisk med den af Leach saaledes benævnte Art,
anser ogsaa Hoek for meget tvivlsomt. Derimod mener han
med Bestemthed i Johnstons Beskrivelse at gjenkjende sin
Art. Om den her omhandlede Forms Identitet med den
af Hoek beskrevne, kan der efter min Mening
ingensomhelst Tvivl være. Egentlig en Artsnavnet gracile kun lidet
betegnende, da der gives mange Arter af en langt slankere
Kropsform, ja nærværende Fonn hører endog i
Virkeligheden til de i denne Henseende mindst udprægede af
Slægten.
Beskrivelse. Hos ingen af de af mig indsamlede
Exemplarer overskrider Legemets Længde S1;,""", medens
Hoek angiver 4""" som Maximum. Spandviden har jeg
fundet at være omkring 15""". Af alle her opførte Arter af
Slægten er denne saaledes den mindste.
Legemets Fonn (se PI. V, Fig. 1) er vistnok
temmelig spinkel, sammenlignet med samme hos flere andre
Pyc-nogonideer; men blandt Arterne af nærværende Slægt
udmærker den sig, som ovenfor bemærket, slet ikke i saa
Henseende. Ja Gangfødderne er her i Forhold til Kroppen
endog kortere end hos nogen af de her opførte Arter.
Selve Kroppen (Fig 1 a, I b) er cylindrisk og noget nær
af ens Bredde overalt, ganske glat og med Segmenterne
vel sondrede fra hinanden. Sidefortsatserne er omtrent saa
lange som Kroppen er bred og vel adskilte, skjøndt
Mellemrummene mellem dem ikke er synderlig brede.
Hovedsegmentet er temmelig stort, omtrent saa langt som de 2
følgende Segmenter tilsammen og har en tydelig, skjøndt
forholdsvis kort Hals; Pandedelen er ved Enden omtrent
dobbelt saa bred som Halsen og langs Midten oventil noget
rendeformigt fordybet. Halesegmentet er forholdsvis lidet,
simpelt cylindriskt og afrundet i Enden, samt noget
opad-rettet.
Øieknuden (se Fig. 1 a, 1 c), hvis Afstand fra
Pande-randeu er omtrent dobbelt saa stor som fra den bagre Kant
af Horedsegmentet, er noget ophøiet. af stump konisk Form;
dog er Hoiden neppe saa stor som Breden ved Basis.
Lindserne er vel udviklede, af ens Størrelse og beliggende
nærmere Basis end Spidsen af Øieknuden ; det underliggende
Pigment er af mørkerød Farve.
Snabelen (se Fig. 1 a, 1 b) er noget kortere end
Hovedsegmentet og lige fortilstrakt. Den er temmelig tyk,
cylindrisk, med Enden stumpt tilrundet, og ganske glat.
Saxlemmerne (ibid.) er kraftigt udviklede og lige
udstrakte. betydelig længere end Hovedsegmentet. Skaftet er
cylindriskt, lidt buet og ved Enden i den ydre Kant
forsynet med nogle korte Haar. Haanden (Fig. 1 d), der
sædvanligvis er rettet indad under en ret Vinkel med
Skaftet, er omtrent af dettes Længde, temmelig opsvulmet, af
aflang oval Form og henimod Basis af Fingrene besat med
Colour white, with more or less distinct violet transversal
bands. Length of body 272’"’". extent 15"™.
Remarks. Hoek was really the first to give a
recognizable description of the present species. But whether
it is really identical with the species thus designated by
Leach. Hoek also regards as very doubtful. On the other
band, he feels quite sure that the form described by
Johnston can be none other than his species. The identity of
the form treated of here with Hoek’s species can, in my
judgment, admit of no doubt whatever. The specific name
gracile is really not significative, as there are many species
with a far more slender body, indeed the present form
belongs even to the least characteristic of the genus in
that respect.
Description. In none of the specimens collected by
the writer does the length of the body exceed 2’/s"",
whereas Hoek gives 4"’" as the maximum. The extent I
have found to be about. 15""". Of all the species recorded
here, this is therefore the smallest.
The body (se Pl. V, fig. 1) is indeed rather slender
compared with that of several other Pycnogonids; but,
as stated above, in this respect it in nowise distinguishes
itself among the species of the present genus. Indeed,
the ambulatory legs are, in relation to the body, even
shorter than in any of the species here recorded. The
trunk itself (fig. 1 a. 1 b) is cvlindric and well-nigh uniform
in breadth throughout, quite smooth, and with the segments
well separated from each other. The lateral processes
are about as long as the trunk is broad, and well separated,
though the interspaces between them are not particularly
broad. The cephalic segment is rather large, about as
long as the- 2 succeeding segments taken together, and has
a distinct though comparatively short neck; the frontal
part is at the end about twice as broad as the neck, and
along the middle dorsally somewhat canalicularly hollowed.
The caudal segment is comparatively small, simple cvlindric.
rounded at the extremity and also directed a little
upwards.
Tlie oculiferous tubercle (see fig. 1 a, 1 c), located
about twice as far from the frontal edge as from the
posterior edge of the cephalic segment, is somewhat
elevated, conically obtuse in form; the height is, however,
scarcely as great as the breadth at the base. The lenses
are well developed, equal in size, and located nearer to
the base than to the point of the oculiferous tubercle; the
subjacent pigment has a dark-red colour.
The proboscis (see fig. 1 a, 1 b), pointing straight
forwards, is somewhat shorter than the cephalic segment.
It is rather thick, cvlindric, with the tip obtusely rounded,
and quite smooth.
The chelifori (ibid.) are powerfully developed and,
extended straight out, a good deal longer than the cephalic
segment. The scape is cylindrical, somewhat arcuate, and
at the extremity on the outer edge provided with a few short
hairs. The hand (fig. 1 d), which is generally directed
inwards at a right angle to the scape, attains about the length
of that pai’t, is rather swollen, oblongo-oval in form, and
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